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Is DeltaH always greater than DeltaU? Ex...

Is `DeltaH` always greater than `DeltaU`? Explain why or why not?

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To determine whether \( \Delta H \) is always greater than \( \Delta U \), we need to analyze the relationship between the two thermodynamic quantities. Here’s a step-by-step explanation: ### Step 1: Understand the Definitions - **Internal Energy (\( \Delta U \))**: This is the total energy contained within a system, including kinetic and potential energies of the molecules. - **Enthalpy (\( \Delta H \))**: This is a measure of the total heat content of a system, defined as \( \Delta H = \Delta U + \Delta (PV) \). ### Step 2: Establish the Relationship The relationship between enthalpy and internal energy can be expressed as: ...
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MODERN PUBLICATION-THERMODYNAMICS-Conceptual Questions -1
  1. Under what conditions is the heat of reaction equal to enthalpy change...

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  2. Identify the kind of energy change usually associated with each of the...

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  3. Show that the product of pressure and volume i.e., pV has the dimensio...

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  4. Neither q nor w is a state function but q + w is a state function.Expl...

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  5. What will happen to internal energy if work is done by the system?

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  6. Is there any enthalpy change in a cyclic process?

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  7. Why do we feel cold on touching ice?

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  8. How many times is molar heat capacity larger than specific heat capaci...

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  9. Which of the following are state functions? (i)q (ii)heat capacity (...

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  10. Explain why heat capacity is not a state function?

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  11. What is the enthalpy change when 1.0 g of water is frozen at 0^(@)C ? ...

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  12. Heat capacity is an extensive property but specific heat is intensive ...

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  13. Which out of force and pressure is intensive property?

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  14. The C(p) and C(v) of a gas are 20.834 and 12.520 J K^(-1) "mol"^(-1) r...

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  15. Why heat changes reported are usually enthalpy changes and not interna...

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  16. What is the relation for work done (i) reversibly and (ii) irreversibl...

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  17. Is DeltaH always greater than DeltaU? Explain why or why not?

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  18. Establish a relationship between DeltaH and DeltaU in Haber synthesis ...

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  19. When an ideal gas expands in vaccum, there is neither absorption nor e...

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